anv: use primitive ID override when shader does not supply it

Patch moves over this fix from iris driver.

Fixes following test on DG2:
   dEQP-VK.rasterization.culling.primitive_id

Cc: mesa-stable
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Ivan Briano <ivan.briano@intel.com> [v1]
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22130>

diff --git a/src/intel/vulkan/genX_pipeline.c b/src/intel/vulkan/genX_pipeline.c
index 6223f0d..68c5eb9 100644 (file)
--- a/src/intel/vulkan/genX_pipeline.c
+++ b/src/intel/vulkan/genX_pipeline.c
@@ -512,6 +512,19 @@ emit_3dstate_sbe(struct anv_graphics_pipeline *pipeline)
       sbe.VertexURBEntryReadLength = DIV_ROUND_UP(max_source_attr + 1, 2);
       sbe.ForceVertexURBEntryReadOffset = true;
       sbe.ForceVertexURBEntryReadLength = true;
+
+      /* Ask the hardware to supply PrimitiveID if the fragment shader
+       * reads it but a previous stage didn't write one.
+       */
+      if ((wm_prog_data->inputs & VARYING_BIT_PRIMITIVE_ID) &&
+          fs_input_map->varying_to_slot[VARYING_SLOT_PRIMITIVE_ID] == -1) {
+         sbe.PrimitiveIDOverrideAttributeSelect =
+            wm_prog_data->urb_setup[VARYING_SLOT_PRIMITIVE_ID];
+         sbe.PrimitiveIDOverrideComponentX = true;
+         sbe.PrimitiveIDOverrideComponentY = true;
+         sbe.PrimitiveIDOverrideComponentZ = true;
+         sbe.PrimitiveIDOverrideComponentW = true;
+      }
    } else {
       assert(anv_pipeline_is_mesh(pipeline));
 #if GFX_VERx10 >= 125